Preheat oven to 180 degrees celcius. Brush a 17 x 27cm tin with melted butter to grease and line base and two sides with non-stick baking paper.

Combine flours, oats, coconut, sugar, sultanas and choc its in a bowl. Make a well in the centre and add the melted butter and egg. Stir to combine then spoon into prepared pan. Use back of metal spoon to smooth the surface.

Bake for 20 minutes. Remove from oven and cool completely before cutting into squares.

This slice will keep for up to 4 days in an airtight container out of direct sunlight. Experiment and try different ingredients. eg using dried apricots in place of sultanas is delicious.